// todo need optimize like in event.jsp. Add indexing or not indexing this page. Multiplication tables (7 ч 50 мин, 18 ноя 2018 г. – 20 ч 53 мин, 30 июл 2019 г.) (Лента времени)
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Multiplication tables (7 ч 50 мин, 18 ноя 2018 г. – 20 ч 53 мин, 30 июл 2019 г.)

Описание:

Until the 1960s, complicated computations were done with the help of mathematical tables.

Добавлено на ленту времени:

Counting/Caculating Inventions

ByEmily Stark
4 ноя 2019

Дата:

7 ч 50 мин, 18 ноя 2018 г.
20 ч 53 мин, 30 июл 2019 г.
~ 8 months
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